armamentarium vs aggregation

armamentarium and aggregation both are nouns.

Word	Noun	Adjective	Verb	Adverb
armamentarium	Yes	No	No	No
aggregation	Yes	No	No	No

As nouns, aggregation is a hypernym of armamentarium; that is, aggregation is a word with a broader meaning than armamentarium:

armamentarium: the collection of equipment and methods used in the practice of medicine
aggregation: several things grouped together or considered as a whole

Other hypernyms of armamentarium include accumulation, assemblage, collection.

armamentarium (noun)	aggregation (noun)
the collection of equipment and methods used in the practice of medicine	the act of gathering something together
	several things grouped together or considered as a whole